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本文给出了一种VSP资料共炮点道集地震资料反射成像的方法,它是由一种通过射线追踪求格林函数的方法,求出各成像点到各炮点和检波点的射线旅行时、射线振幅和射线路径,然后根据Snell定律找出满足反射定律的炮检对,利用约束加权克希霍夫法进行成像。本方法适应速度的纵向和横向变化,它优于简单的VSP-CDP资料转换成像方法,通过模型和实际资料的成像应用表明,此法不仅成像精度高,而且有利于改善剖面的频率特性。
In this paper, we present a method of reflectivity imaging of seismic datasets with VSP data. The method is based on ray tracing of Green’s function. The ray travel time of each imaging point to each shot point and detection point is obtained , Ray amplitude and ray path, and then according to Snell’s law to find the law to meet the law of reflection gun detection, the use of constrained weighted Kirchhoff method for imaging. The method adapts to longitudinal and lateral changes of velocity. It is superior to the simple VSP-CDP data conversion imaging method. The imaging application of the model and actual data shows that this method not only has high imaging accuracy but also improves the frequency characteristics of the profile.